Determination of the Pion Charge Form Factor at and
Journal Article
·
· Physical Review Letters
The H(e,e{prime}pi+)n cross section was measured at four-momentum transfers of Q2=1.60 and 2.45 GeV2 at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F{sub pi}) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F{sub pi} is a free parameter. The results indicate that the pion form factor deviates from the charge-radius constrained monopole form at these values of Q2 by one sigma, but is still far from its perturbative Quantum Chromo-Dynamics prediction.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- Contributing Organization:
- Jefferson Lab Fπ Collaboration
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 894664
- Report Number(s):
- JLAB-PHY-06-523; DOE/ER/40150-4100; nucl-ex/0607005; PRLTAO; TRN: US0700212
- Journal Information:
- Physical Review Letters, Vol. 97, Issue 19; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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